When a vehicle has been involved in a collision, it is the job of the autobody repairer to restore it to factory standards and get it back on the road. Every accident is different, so the repairer must be familiar with often-complex mechanical components and how they work.
The autobody repairer needs professional expertise to diagnose the damage to the vehicle and then use a variety of machinery and tools, including welding skills, to make the repair. You need a good knowledge of the range of metals, composites, and plastics used in the manufacture of vehicles in order to restore them to a roadworthy condition.